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/* xutil.c - Various wrapper functions to abort on error.
*
* Copyright © 2009 Carl Worth
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Author: Carl Worth <cworth@cworth.org>
*/
#include <stdio.h>
#include <string.h>
#include "xutil.h"
#include "error_util.h"
void *
xcalloc (size_t nmemb, size_t size)
{
void *ret;
ret = calloc (nmemb, size);
if (ret == NULL) {
fprintf (stderr, "Out of memory.\n");
exit (1);
}
return ret;
}
void *
xmalloc (size_t size)
{
void *ret;
ret = malloc (size);
if (ret == NULL) {
fprintf (stderr, "Out of memory.\n");
exit (1);
}
return ret;
}
void *
xrealloc (void *ptr, size_t size)
{
void *ret;
ret = realloc (ptr, size);
if (ret == NULL) {
fprintf (stderr, "Out of memory.\n");
exit (1);
}
return ret;
}
char *
xstrdup (const char *s)
{
char *ret;
ret = strdup (s);
if (ret == NULL) {
fprintf (stderr, "Out of memory.\n");
exit (1);
}
return ret;
}
char *
xstrndup (const char *s, size_t n)
{
char *ret;
if (strlen (s) <= n)
n = strlen (s);
ret = malloc (n + 1);
if (ret == NULL) {
fprintf (stderr, "Out of memory.\n");
exit (1);
}
memcpy (ret, s, n);
ret[n] = '\0';
return ret;
}
int
xregcomp (regex_t *preg, const char *regex, int cflags)
{
int rerr;
rerr = regcomp (preg, regex, cflags);
if (rerr) {
size_t error_size = regerror (rerr, preg, NULL, 0);
char *error = xmalloc (error_size);
regerror (rerr, preg, error, error_size);
fprintf (stderr, "compiling regex %s: %s\n",
regex, error);
free (error);
return 1;
}
return 0;
}
int
xregexec (const regex_t *preg, const char *string,
size_t nmatch, regmatch_t pmatch[], int eflags)
{
unsigned int i;
int rerr;
rerr = regexec (preg, string, nmatch, pmatch, eflags);
if (rerr)
return rerr;
for (i = 0; i < nmatch; i++) {
if (pmatch[i].rm_so == -1)
INTERNAL_ERROR ("matching regex against %s: Sub-match %d not found\n",
string, i);
}
return 0;
}
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